人为某样东西实际支付的成本至少是标价的两倍，因为买来后设置、学习、维护、修理，以及最后处置，也需要耗费精力、时间和钱。不是所有的实际成本都在价签上。实际成本是标价的2倍。
Ethical leadership isn't about being perfect - it's about being accountable.
Every day may not be good, but there’s something good in every day.
Keep your feet on the ground and keep reaching for the stars.
【释义】事先考虑好可能的问题，就不会陷入困境；提前做好准备，就不会陷入绝境。
The key to success is failure… Success is made up of 99 percent failure.
He not busy being born is busy dying.
The future of forestry is circular, not linear.
不曾有过一个女儿这样爱过他的父亲，也不曾有一个父亲这样被他女儿爱。